Much of the the Boardwalk went dark Saturday night as the Caesars properties in Atlantic City cut most outside lights to observe Earth Hour.
The World Wildlife Fund event called for lights to be shut off between 8:30 p.m. to 9:30 p.m. Saturday to raise awareness about the danger of climate change.
The four Caesars properties in Atlantic City -- Caesars, Harrah’s Resort, Bally’s and Showboat -- participated for its sixth year.
The casinos were encouraging guests and employees to turn off nonessential interior lighting, too.
Caesars said in a release that the Earth Hour event is "one of many ways that we participate in activities that improve the lives of our employees, guests and our community. We are also encouraging employees and guests to keep the spirit of Earth Hour alive by making a habit of turning off unnecessary lights and personal equipment when it is not in use, both at work, or at home.”